Calling device for telephone-exchanges.



C. A. ANDERSON.

CALLING DEVICE FOR TELEPHONE EXCHANGES.

APPLICATION FILED JAN. 19, 1911. 1,095,539, I Patented May 5, 1914.

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CALLING DEVICE FOR TELEPHONE EXCHANGES. APPLIOATION FILED 11111.19, 1911.

1,095,539. Patented May 5, 1914,

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744773601X J 7 (6/61 1e, /(7 Wad/1115;! gammy a W c. A. ANDERSON. CALLING DEVICE FOR TELEPHONE EXCHANGES.

APPLIOATIONIILED JAN. 19, 1911.

1,095,539. Patented May 5, 1914.

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1 wwm UNITED STATES PATENT OFFICE.

CLARENCE A. ANDERSON, or CHICAGO, ILLINOIS, AssrsNon T0 ANnEBsoN ELECTRIC AND MANUFACTURING COMPANY, or WICHI'IA', KANSAS, A CORPORATION or KANSAS.

CALLING DEVICE FOR TELEPHONE-EXCHANGES.

My invention relates to calling'devices fortelephone exchanges, and has for its object improvement in such devices. 7

It also has for its object the adaptation for use in party line exchanges of some of the apparatus now in common use in automatic telephone exchanges and a rearrangement of some of the parts of the calling device so that other parts heretofore forming a part of a calling device now become part of the exchange proper 'to be described inconnection with a description of such an exchange.

In the accompanying drawings Figure 1 is a side elevation of -a calling device; Fig. 2 is a frontlelevation of the same; Fig. 3 is an enlarged inside view of the impulse sending part of the device; Fig. 4 is a view in the direction 4 of Fig. 3; Fig. 5 is a view of part of the apparatus shown in Fig. 4, the direction being opposite to that in Fig. 4; Fig. 6 is a view of the same parts in the direction 6 of Fig. 5; Fig. 7 is a plan looking into'the interior of the part of the casing upon which the previously mentioned parts are mounted; Fig.8 is an interior view of the-base; and Fig. 9 is a section on line 99 of Fig. 8.

In the said drawings, 10 is a disk pivoted in the center, in which disk are a series of holes. These are arranged sothat an operator putting his finger in a hole may move the disk in the direction of the arrow of Fig.

- 2 until the finger engages stop 11. The numbers shown through the openings in the disk 10 are for indicating the number of spaces through which the disk 10- will be moved" when the-finger strikes the stop 11. Just underneath the disk 10 is a trigger 12 which is engaged by thefinger just before it reaches the stop 11 and is moved a certain distance. The moving of the disk 10 sets the device for making a series of contacts for the pur ose of sending out impulses over a telep one line, and the trigger 12 is a locking device for preventing the disk 10 from bein moved until after the impulses are sent.

Specification of Letters Patent.

Application filed January 19, 1911.

I of the mechanism to a lever of the casing 21.

tom of the calling e trig-i ger 12 is'connected through the upper part Serial No. 603,419.

13 on a post 14 as shown in Fig. 3. When the trigger 12 is Patented'May 5, 1914..

moved by hand, the lever 13 is moved'down- I ward as shown in Fig. 3 so that apiece of lnsulation 15 will engage a spring 16 and move said sprin away from another spring 17, as shown in Fig. 5. The object of this is to break the electrical connection between the springs 16 and 17 while the lever 13 is moved from its normal position.

The effect of moving the disk 10 and also the trigger 12 is to wind up an internal clock spring (not shown) and start into operation a cam '18 to vibrate a cont ct spring 19 a number oftimes which will .correspond to the distance through which the with the. clock spring and cam18'is a stop or catch (not shown) which acts to hold the other. The apparatus acts automatically to permit this lever to move back to its normal position.

The parts .of the "apparatus so far do scribed, except the springs shown in Fig. 5

and the means for operating-part of them by the lever 13, is apparatus already in use in connection with automatic telephone exchanges and is well-known. It will therefore not be further described herein.

The apparatus shown in Fig- 3 and Fig. 4.- is secured to the inclined part 20 of the casing 21 by screws 22, which screws when loose drop down into slots 23 shownin Fig. 7. By tightening up these screws the impulse sending part is secured to theinclined part 20 of the casing/ The inside of the inclined part has a series of contact posts 24 which are engaged by the other springs shown in Figs. 3, 4 and 5. These Contact posts are provided with wires 25 which are connected to springs, 26 in the lower part From these springs a cable of wires 27 leads out through the botdevice of apparatus through which the impulses are to be sent by the calling device. The upper inclined part 20 of the casing is secured to the lower part by screws 28. The inclined part-is arranged so that the impulse sending part I disk 10 has been moved by hand.'- Connected.

involving the disk 1.0 and its associated parts stands at an angle of about 45 from the support upon which the base 21 rests. Fig. 1 shows the apparatus arranged to set on a flat table with the disk 10 within easy reach. It will be obvious that by turning the apparatus around so that the lower face. of the casing 21 sets against the vertical wall, the disklO may also be in the same relative position it is when sitting on a table, that is, it will be at an angle of 45 from the horizontal.

At 29 is pivoted a key 30, the inner end of which is adapted to engage one or another of the springs 31 and 32 which form part of the general assemblage of springs heretofore designated as 26. The springs 31 form one set which are arranged together in two groups, and the springs 32 similarly 'arranged iorm another set. 011 the front of the device near the key are the words Magneto and Com. Bat. These words placed on the apparatus indicate that if the key 30 is pressed in one direction, the apparatus will be connected to the impulse sending part so that said impulse sending partwill send impulses" 'for a common battery system If the key is pressed in the other direction, then the impulse sending device will send impulses for a magneto system. 7

In this connection it should be understood that this calling .device is arranged to be connected in succession to any one of a number of difierent party line systems and that such systems may be either common battery systems or magneto systems and that the calling device will operate withequal facility on either system. The electrical connection by which it so operates is not necessarily a part of the present invention as ing the 'gether,

illl 1,095,539

such electrical arrangements are set forth in applications for the systems themselves.

On the lever to which the key 30 is secured'is a pin 33 which may be removed from that" osition and inserted in either one I of two ho es 34. When the pin is located at the position 33, the key may be moved in either direction for either'kind of system;v

If however, the device is to be used only in connection with one of the two mentioned systems, then the pin 33 may be removed from its central position and placed in one of the holes 34. When so'placed the key 30 can be moved only in one direction.

What I claim is 1. The combination with a calling device of the character described, of a casing provided with contact springs and a key for shifting them, an intermediate section for connecting the calling device to the casing and so arranged at an angle to the base of the caslng, and

electrical connections between the calling" device and the springs in the casing, said as to hold the calling device electrical connections being mechanically connected to and supported in the intermediate section.

2. The combination with a cylindrical casing, contact springs and a key therefor located in said casing, and a calling'device of an intermediate cylindrical section connect calling device and the casing tosaid intermediate section being so arranged as to support the calling device at an incline with respect to the casing.

Signed at Chicago this 17th day of January 1911.

CLARENCE A. ANDERSON.

Witnesses:

WALTER 'H. REDFIELD, C. L. Rnnrrnno. 

